Method of cutting beveled lumber



Fatented Aug. 12, 1924.

UNITED STATES PATENT OFFICE- DAV I) BGARY, OF EVERETT, NASHINGTON, ASSIGNOR OF ONE-HALF TO HARRY L.

GARY, OF EVERETT, WASI-IINGTON. 1

METHO OF (TLTTTIINTG-l BEVELED LUMBEE.

Application filed September 7, 1923. Serial No. 661,422.

To aZZ whom it may concern: V

Be it known that I, DAVID B. GARI, a citi- Zen of the United States of America, and

resident of the city of Everett, in the county of Snohomish and State of VVashington, have invented certain new and useful Improvements in Methods of Cutting Beveled Lumber, of which the following is a specification. i

My invention consists of a method' of sawing logs and cants in the production of beveled edged lumber, whereby the log is made to produce a larger percentage of finished product than when it is sawed by the more customary methods.

The object of my invention is, therefore, not only to produce a better product, but a larger amount of it from the same material.

The accompanying drawings taken together with the following description, will clearly indicate the method which I employ. V

Figure 1 is a cross section of a log showing the firstv step in the process of cutting this up.

Figure 2 represents one of the segments.

of the log produced by sawing such as illustrated in Figure 1. It also illustrates the manner in which this segment is out into cants for later sawing in accordance with the plan illustrated in Figure 8.

Figure 3 illustrates the method of final sawing of the cants to produce the beveled lumber.

The particular product for which my invention is employed is the production of beveled lumber, ordinarily referred to in.the trade as clapboards. These, as well as what is ordinarily referred to as bevel siding, are thicker at one edge than at the other. Such lumber is used as a finish covering for houses. For such purposes it is very desirable that the lumber be vertical grain. As this product is a high class product, bringing a good price, the production of as large an amount as possible from a given log becomes a desirable object.

When the production of such lumber is from the log, the log is first cut into triangular segments, such as is indicated in Figure 1 by the lines 10. The manner in which this is done is largely immaterial. I prefer to do this by a mechanism which is adjusted so that it will saw a kerf in the log, which kerf is as truly radial as may conveniently be obtained and which stops just short of the center of the log, thereby leaving a smallcircular section 11 which binds the points of all of the segments 1 together. A log so vsawn may be separated in its component segments by splitting them off at the center. This, if done from the large end, will not cause any material splintering or running into the body of the segments.

Tith segments 1 as thus formed, the next step is to saw them into cants, as indicated by the lines 12 of Figure 2. These cants are then sawed after the manner indicated in Figure 3. To secure this result the relative angular position of the cants and the saw must be capable of adjustment so as to make the cut across the cant at whatever angle is desired within certain limits. In a cant such as shown in Figure 3, two of the opposite sides are parallel and the other two Sides are tapering with relation to each other. The cuts made across such a cant are indicated by the transverse lines 2 of Figure 3. The first cut is so made that the thick edge of the clapboard lies at the broadest face of the cant. The neXt cut, if the taper of the side of the cant is suflclcient to warrant it, is made in the same manner. However, the position'of the thick edge of the boards sawed from the cant is reversed as soon as in the `iudgment of the operator this is desirable to maintain proper shape of the cant and to secure a true vertical condition for the grain of the board. This brings the thin edges of certain of the boards towards the broadest face of the cant. The number of boards so sawed will depend upon the size of-the cant and the angle between the original tapered faces of the cant. This is a matter to be determined by the operator.

It is evident that by suitably distributing the position of the boards as cut from the cant, the entire body of the cant may be embodied in the boards cut, less, of course, the

amount removed as saw dust. In the final step in the manufacture of the finished product, namely clapboards, the boards as received from the sawing machine are run through a sizing planer so that they are made absolutely true and uniform, both in thickness and in the width, so that when the ends of two boards are abutted in applying them to a building, there will be no ridge, but a'n absolutely smooth surface extending over the joint. W'here this is Secured, the

applition ofpaint will eiiininte thejoint so tartisb its visibility extends.

i Bythe inethodof Sawing above indicated7 the'v mount'ofV luinber capa'ble of being secured froni a log of given size niay be quite material-ny incre-ased, thusv making it possible to produce the himber at a s'lightly iower o cost, or for manufacturersfto.,secure a somewhat larger profit.

-What ,clailn as my invention is: 1.' The'inethod, of cutting beveled l'uinber which consists in -first cuttingthe log into tringular segnients7 cutting these segments into cnnts iby cuts extending at right angles to the radius of the log whichV bisects such cut, :then cutting the cants into Vertical grain beveled iuinber, alternating the position of the thick and t-hin edges-of the lurnber as required to use up the entire cant without Waiste.l i' i i. 2.. .The method of cutting beveled' hunber which consists in first cutting the log into trianguiar seginents, cutting these segments into cants by cuts cxtending at right ungles to the radius of the log which bisects such out, then cutting the cants into vertical grain beveied hunber, alternating the position of the thick and thin edges of the luniber as required to use up the entire cant without waste, and then passing the lulnber through a sizing planer.

3. The method of forniing beveled 111111- ber which consists in first cutting cunts having .two opposite paraiiel Sides and two opposite sides inciined toward each other, then cutting the bevehd hunber with its edges at the pamilei Sides, disposing the thick and thin edges in alternation as needed to prevent waste. V

Signed at Everett, Snoholnish County, iVnshington, this lith day of August, 1923.

i DAVID B. GARY. 

